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http://dx.doi.org/10.5389/KSAE.2017.59.6.001

Analysis of Heating Load Characteristics for Greenhouses Constructed in Reclaimed Lands  

Nam, Sang Woon (Department of Agricultural and Rural Engineering, Chungnam National University)
Shin, Hyun Ho (Graduate School, Chungnam National University)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.59, no.6, 2017 , pp. 1-8 More about this Journal
Abstract
The purpose of this study was to provide basic data for development of environmental design technology for greenhouses constructed in reclaimed lands. We analyzed the climatic conditions around seven major reclaimed land areas in Korea, which have a plan to install advanced horticultural complexes. The characteristics of heating load through the thermal environment measurement of the greenhouse in Saemangeum were analyzed. The part to be applied to the environmental design of the greenhouses in reclaimed lands were reviewed. The overall heat transfer coefficient of the experimental greenhouse with the aluminum screen and multi-layer thermal curtain averaged $3.79W/m^2^{\circ}C$. It represents a 44 % heat savings rate compared with plastic greenhouses with a single covering, which was significantly lower than that of the common greenhouses with 2-layer thermal curtains. This is because the experimental greenhouse was installed on reclaimed land and wind was stronger than the inland area. Among the total heating load, the transmission heat loss accounted for 96.4~99.9 %, and the infiltration loss and the ground heat exchange were low. Therefore, it is necessary to take countermeasures to minimize the transmission heat loss for greenhouses constructed in reclaimed lands. As the reclaimed land is located on the seaside, the wind is stronger than the inland area, and the fog is frequent. Especially, Saemangeum area has 2.6 times stronger wind speed and 3.4 times longer fog duration than the inland area. In designing the heating systems for greenhouses in reclaimed lands, it is considered that the maximum heating load should be calculated by applying the wind coefficient larger than the inland area. It is reasonable to estimate the operation cost of the heating system by applying the adjustment factor 10 % larger than the average in calculating the seasonal heating load.
Keywords
Environmental design; Fog duration; Heating load; Thermal insulator; Wind speed;
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Times Cited By KSCI : 8  (Citation Analysis)
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1 American Society of Agricultural and Biological Engineers (ASABE). 2008. Standard: Heating, ventilating and cooling greenhouses. ANSI/ASAE EP406.4. ASABE, Michigan, USA.
2 Baptista, F. J., B. J. Bailey, J. M. Randall, and J. F. Meneses, 1999. Greenhouse ventilation rate: Theory and measurement with tracer gas techniques. J. Agric. Engng Res. 72(4): 363-374.   DOI
3 Choi, M. K., S. W. Yun, I. H. Yu, S. Y. Lee, and Y. C. Yoon, 2015. Settlement instrumentation of greenhouse foundation in reclaimed land. Protected Horticulture and Plant Factory. 24(2): 85-92 (in Korean).   DOI
4 Diop, S., J. W. Lee, and H. W. Lee, 2014. Measurement and comparison of overall heat transfer coefficients for greenhouse covering materials with thermal screens. Journal of the Korean Society of Agricultural Engineers 56(4): 41-51 (in Korean).   DOI
5 Japan Greenhouse Horticulture Association (JGHA). 2007. Handbook of protected horticulture 5th edition. JGHA, Tokyo, Japan.
6 Kim, M. K., S. G. Lee, W. M. Seo, and J. E. Son, 1997. Design standards for greenhouse environment. Rural Development Corporation, Ansan, Korea (in Korean).
7 Kim, R. W., D. W. Kim, K. C. Ryu, K. S. Kwon, and I. B. Lee, 2014. Estimation of wind pressure coefficients on even-span greenhouse built in reclaimed land according to roof slop using wind tunnel. Protected Horticulture and Plant Factory 23(4): 269-280 (in Korean).   DOI
8 Korea Meteorological Administration (KMA). 2011. Climatological normals of Korea. KMA, Seoul, Korea (in Korean).
9 Kozai, T., T. Gunji, and I. Watanabe, 1982. Measurements and analyses of the daily heating load of a greenhouse. Journal of Agricultural Meteorology 38(3): 279-285.   DOI
10 Lee, H. W., S. Diop, and Y. S. Kim, 2011. Variation of the overall heat transfer coefficient of plastic greenhouse covering material. J. of Bio-Env. Control 20(2): 72-77.
11 Lindley, J. A. and J. H. Whitaker, 1996. Agricultural buildings and structures. ASAE, Michigan, USA.
12 Mihara, Y., Y. Naitou, and T. Takakura, 1978. Investigations on the heating load of a large plastic greenhouse. Journal of Agricultural Meteorology 33(4): 189-193.   DOI
13 Ministry for Food, Agriculture, Forestry and Fisheries (MIFAFF). 2010. Designated notice 2010-47: Basic plan for practical use of large scale reclaimed land. MIFAFF, Gwacheon, Korea (in Korean).
14 Shin, H. H. and S. W. Nam, 2016. Experimental study on the characteristics of ground heat exchange in heating greenhouses. Protected Horticulture and Plant Factory. 25(3): 218-223 (in Korean).   DOI
15 Nam, S. W. and H. H. Shin, 2015. Experimental study on the infiltration loss in plastic greenhouses equipped with thermal curtains. Protected Horticulture and Plant Factory 24(2): 100-105 (in Korean).   DOI
16 Ogura, Y., 1982. Some results of actual observations of net radiation and soil heat transfer in unheated greenhouses. Journal of Agricultural Meteorology 37(4): 303-308.   DOI
17 Shin, H. H. and S. W. Nam, 2015. Validation of load calculation method for greenhouse heating design and analysis of the influence of infiltration loss and ground heat exchange. Kor. J. Hort. Sci. Technol. 33(5): 647-657 (in Korean).
18 Society of Air-Conditioning and Refrigerating Engineers of Korea (SAREK). 2011. Handbook of facilities engineering. Vol. 2 Air-conditioning. SAREK, Seoul, Korea (in Korean).
19 Spitler, J. D., 2010. Load calculation applications manual. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. Atlanta, USA.
20 Song, C. S., M. H. Kim, and U. H. Jang, 2016. Comparison analysis of model test for prediction of uplift resistance in the reclaimed land greenhouse foundation. Journal of the Korean Society of Agricultural Engineers 58(2): 45-52 (in Korean).   DOI